Borla · New
Borla XR-1 Racing Sportsman 3.5in. Outlet / 3.5in Inlet Oval Muffler
MPN 40945 · Store SKU bor40945
Supplier stock checked 11/7/2026, 11:24:24 AM UTC. Adding a part does not reserve it.
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Product details
High quality austenitic stainless steel. Patented, race-winning XR-1 Raceline technology. 3 options: Offset - Made with the same patented, flow through design as the XR-1 Sportsman oval. The inlet/outlet are offset to the same side of the muffler, to accommodate transmission and frame rail interference on some applications Oval -- BORLAs #1 selling racing muffler. Satisfies the needs of most racing applications because it is the lightest, most compact, and highest flowing racing muffler in its class and at a competitive price. Record-holder Hurley Blakeney has run BORLAs on his AA/AT Ford T-Bird because he loves the quieter driver compartment without giving up any power.Round - Made with the same patented, flow through design as the XR-1 Sportsman Oval. This Muffler is 5 inches in diameter and 15 inches long. Designed for door car/ roadster applications that require a compact round muffler. XR-1(r) Sportsman Racing Muffler. 3.5" Center Inlet/ 3.5" Center Outlet 4.25" x 7.88 Oval x 12" Long Body 17" Overall Length. Compact size is perfect for applications with limited space. Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel for superior corrosion resistance. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Hands down, BORLA(r)'s XR-1(r) raceline parts offer the best balance of sound and power. Best of all, it's made in the USA. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. XR-1 Sportsman Racing Muffler - 3.5" Center Inlet/ 3.5" Center Outlet 4.25" x 7.88" Oval x 12" Long Body 17" Overall Length. Universal Part. Reversible Design. XR-1® Stainless Sportsman Racing Mufflers XR-1 Sportsman Muffler
Manufacturer fitment & guides
Check 40945 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
